Pura Disc 25mm PES Syringe Filters, 0.2um, 200 Pk
Whatman SKU: 6781-2502

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 0.2 µm, 25 mm, 200/Pk - 6781-2502

Whatman verifies performance ratings at the lot level using process controls that stay uniform across its entire filtration lineup. A sterilizing-grade syringe filter delivers point-of-use sterile filtration in a single-use format, without the housing and gasket maintenance a reusable stainless steel filter holder requires. The PES matrix tolerates aliphatic alcohols, glycols, and aqueous buffers and reaches sterile-grade performance while protecting analyte yield. The polypropylene housing keeps the sample chemically unaltered across the pass while sustaining efficient flow on viscous samples and presses snugly against the membrane during the pass. The bench setup stays free of autoclave cycles and housing-maintenance steps once a single-use sterilizing-grade filter handles the preparation.

Technical Specifications

• Sterilizing-grade PES membrane lots are challenge-tested against Brevundimonas diminuta to qualify 0.2 micron retention
• Chemical breadth spans alcohols, glycols, and aqueous buffers
• Aromatic sulfone backbone underlies stability across the full pH range
• Compatibility spans both nucleic acid and protein-based filtration
• Operating temperatures up to 130°C leave mechanical integrity intact

Housing Specifications

• Thermal-bonded construction keeps adhesives out of the fluid path
• Burst pressure rating provides a wide safety margin above the rated maximum operating pressure.
• Impact-tolerant polypropylene body withstands routine bench handling without damage
• Minimal intrinsic autofluorescence from the polypropylene housing supports background-sensitive fluorescence-based assay work downstream.

Filtering buffers, reagents, and aqueous samples keeps your preparation moving and consistent. Consistent aqueous clarification clears particulates without slowing your bench routine the same way every time you run it. Request blanket-order pricing on your routine filtration purchases, and the Tisch Scientific team will also pull together the paperwork.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Bubble Point (psi)

3.4 bar (50 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.2cm²

Holdup Volume

<100µl

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

200

Pore Size (µm)

0.2

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Media Preparation - Facilitates rapid sterilization of tissue culture additives, lowering contamination risk during sensitive laboratory work.
• Urine Drug Screening - Clarifies protein-poor urine samples for dilute-and-shoot LC-MS/MS toxicology testing without adsorbing target drug analytes.
• PFAS Water Testing - PES filters process aqueous samples for EPA Method 1633A PFAS testing without added fluorinated background.
• Pesticide Residue Testing - PES membranes improve polar pesticide recovery in food-safety LC-MS/MS testing versus hydrogen-bonding nylon.
• Biological Assays - Protects sensitive enzymatic and antibody-based assays from particulate interference without adsorbing critical reagents.
• Sample Recovery - Minimizes sample loss in low-protein-binding applications, delivering high yield for precious or rare biological specimens.